<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
${error!}
<form action="${request.contextPath}/login" method="post">
    <div class="form-group">
        <input type="text" class="form-control" placeholder="用户名" name="username">
    </div>
    <div class="form-group">
        <input type="password" class="form-control" placeholder="密码" name="password">
    </div>
    <button type="submit">登 录</button>
</form>

</body>
</html>